/S. J. /Smith on Brazilian Cfustacea. 19 



ly indicated, and covered, as is also the upper side of the abdomen, 

 with small squamiform tubei'cles of uniform size, and each bearing 

 several small fascicles of short setaceous hairs. The anterior margin, 

 the margin of the orbits, and the lateral margin are armed with 

 numerous, small, obtusely rounded, tuberculiform teeth. 



The antennulte extend slightly beyond the tips of the antennae ; the 

 basal segments are clothed below with short seta^ ; the terminal seg- 

 ments of the peduncle are smooth and cylindrical ; the inner flagella 

 are nearly as long as the last segment of the peduncle, sparsely ciliate 

 and tapering regularly to a slender point ; the outer flagella are 

 stouter, and considerably shorter than the inner. In the antenna?, the 

 basis is very short and broad, so that, on the outside, the base of the 

 ischium nearly touches the anterior margin of the carapax ; the 

 ischium is much broader than long, the middle portion rough and 

 hairy, the outer and anterior margins smooth and naked, and the 

 edges slightly and irregularly toothed, except the process on the inner 

 side which has two strong teeth upon its inner edge and a smaller one 

 on the anterior edge toward the articulation with the merus ; the car- 

 pal, or last segment, is broader than long, the edge arcuate and cren- 

 ulated, the middle portion above and below roughened mtli short, 

 stiff hairs, but a broad space along the margin smooth. 



All the inferior surface of the thorax and the exposed parts of its 

 appendages are rough with short, stiff hairs or setse. The thoracic 

 legs have a carina upon the posterior edge of the merus and carpus, 

 which is very high and thin on the merus in all except the posterior 

 pair. The dactyli in the first and second pairs are smooth and 

 unarmed, but in the second pair they are longer and much slenderer 

 than in the first ; in the last three pairs they are armed with fascicles 

 of stout horny setse. 



The lamellae of the appendages of the second segment of the abdo- 

 men are lanceolate, and the inner and outer of about equal size. 

 The appendages of the three succeeding segments are nidimentary 

 and scarcely project below the edge of the segments. The lamellae 

 of the appendages of the penultimate segment are broadly rounded 

 at the extremities, and the inner ones project beyond the tip of the 

 terminal segment. The terminal segment is broader than long, and 

 the extremity truncate with the angles rounded. 



The following description of the colors was taken from the speci- 

 men when recently preserved in alcohol, and when, according to 

 Prof. Hartt, the colors were as in life. 



General color above reddish-brown ; antennae lighter, bordered with 

 bright purple, and the teeth of the edge orange-red ; antennulae light 



